Steam-pressure regulator for can e-mills



' zsn eets sheet 1 S; M. MALI-IIOTK: G. A. ,LEJEUNE. STEAM PRESSUREREGULATOR FOR CANE MILLS.

NO. 445,856. Patented Feb. 3,1891.

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s. M. MALHIOT & 0. A. LEJ I STEAM PRESSURE REGULATOR FOR CANE MILLS.

Patented Feb. 3, 1891.

WW I% Q WITNESSES:

ATTORNEYS UNITED, STATES PATENT Felon.

SAMUEL MILLS MALHIOT AND CAMILLE A. LEJEUN 3, or AL EEMARLE, LOUISIANA.

STEAM-PRESSURE REGULATQR FOR CANE-MILLS.

SPECIFICATION forming part of Letters Patent No, 445,856, dated February3, 1891.

Application filed September 23, 1890. Serial No. 365,887. (No model.)

To all whom it may concern.-

Be it known that we, SAMUEL MILLS MAL- H101 and OAMILLE A. LEJEUNE, bothof Albemarle, in the parish of Assumption and State of Louisiana, haveinvented a new and Improved Steam-Pressure Regulator for (Jane Mills, ofwhich the following is a full, clear, and exact description. Referenceis to be had to the accompanying drawings, forming a part of thisspecification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of a cane-mill, partly in section, providedwith our improved pressure-regulator. Fig. 2 is a vertical transversesection on the line was of Fig. 1 and g y of Fig. 3, and Fig. 3 is ahorizontal section on the line .2 of Fig. 2. Fig. 4 is an end elevationof a portion of the mill.

The object of our invention is to provide means for maintaining auniform pressure of the upper roll of a cane-mill upon cane passingthrough the mill, the pressure being of a character that will yield soas to allow the rolls to separate, so that a hard substance or anunusually large body of cane may be passed through the rolls Withoutinjury to the machinery and without causing the stoppage of the rolls.

The features of novelty are hereinafter described in connection withothers forming the complete mechanical pressureaegulator.

The shafts of the rollers A B are journaled in boxes 0 D, placed in thehousing E. The lower journal-boxes D are supported in a fixed position.are capable of sliding in the housings. Yokes or caps F rest upon andmove up and down with the boxes 0 and receive the bolts a, which extendthrough the housings, through the base G, through the fulcrum-bars ll,the plate I, and the cross-bars J. The bars H are each provided with acylindrical steel bar Z), secured thereto and forming the fulcrums ofthe levers K, placed upon opposite sides of the machine and oppositelyarranged with respect to each other.

The shorter arms of the levers K rest upon steel rollers c, which bearupon the upper face of the plate I, the said plate I being provided Theupper journal-boxes C with side flanges cl for retaining the saidrollers in place. The levers K are arranged in two series of three each.The outer ends of the said levers are connected by a cross-bar L. Underthe bars L are arranged the steamcylinders M, containingthe pistons N,provided with piston-rods O, in contact with the crossbar-s L. Thecylinders M are connected by the pipe P, which is provided with T e forreceiving the steam-supply pipe Q. The pipe Q communicates with thesteam-dome R, and is provided nearthe dome with a checkvalve f, apressure-regulator g, which may be of any known form, a globethrottle-valve h, and an ordinary safety-valve 1', arranged in the ordernamed. The steam-gage j, communicating with the pipe Q, indicates thepressure of the steam in the cylinders M. The bolts a, which extendthrough the yokes F, the bars ll, plate I, and cross-bars J, areprovided below the said cross-bar J with keys 7c. \Vhen the steam isadmitted to the cylinders M, it is reduced to the required workingiiressure by the reducing-valve g-that is to say, the valve serves toreduce the steam-pressure in the cylinders M to the required degreeregardless of the higher pressure in the boiler. For example, supposethe normal boiler-pressure in a factory to be one hundred pounds, butthat only eighty pounds are required to be applied to the rolls. Thenthe regulatingvalve h is set to eighty pounds and the safety valve 2' tothe same. When cane is introduced between the rolls A B, the upper rollA is lifted against the pressure of the steam in the cylinders M throughthe medium of the levers K. hen abodyof cane, whether it is large orsmall, is passed between the rolls, it is subjected to the same pressurewith out regard to the distance between the rolls. hen an unusuallylarge quantity of cane is introduced by uneven feeding and the upperroll is suddenly lifted, the downward move ment of the pistons N in thecylinders M causes the check-valve f to close, when the further movementof the pistons compresses the steam in the cylinders and in the pipesconnected therewith. \Vhen the prescribed limit of pressure is reached,the safety-valve i opens, allowing the steam to escape, thus preventingany further increase in the pressure. As soon as the roll A assumes itsnormal position the check-valve f opens automatically and the operationproceeds as before. Each cylinder M is provided with a petcock Z forletting off the Water of condensation.

Although Wehave described our invention in connection With a cane-mill,We do not limit or confine ourselves to its particularuse, as theinvention is equally applicable to crushing-rolls and rolls foranalogous purposes.

Having thus fully described our invention, we claim as new and desire tosecure by Letters Patent- The combination, with alower roll and an upperroll adapted to move vertically in suitable guides and bolts or rodsconnected with said upper roll and extending downward, as shown,'of theplate I, the levers K, fulcrumed on the latter and adapted to act onsaid rods, 7

plied to said pipe, as shown and described, to 25 operate as specified.

SAMUEL MILLS MALHIOT. CAMILLE A. LEJEUNE.

l/Vitnesses:

M. DUPATY, HUGUES LARRE.

